TDS Meter, Water Quality Tester, Accurate and Reliable, Hydroponic Nutrient Meter, Household Drinking Water, Pool, Aquarium Water, Comes with Carrying case, 0-9999ppm.

This meter works. What more can I say? I calibrated it out of the box, and have been using it for about 3 months without the need to recalibrate. I find this meter to be extremely accurate and useful. You will get value for your dollar with this pH meter. I would recommend this product. UPDATE: after 2 ½ - 3 years of use, I had to recalibrate the meter. I used the last of two calibration powders they provided (used the first upon initial use). Worked perfectly and the meter is once again accurate. You can tell it’s going wonky when the meter keeps changing levels while in the water. I need another as a back up but they have not been available. I would DEFINITELY but this again!

This thing works, what can I say! You want to know if rain water is equal to distilled water? This is how!

It seems to work well, it is simple to use. I would bought one that also measured ph if I had done s little more reaserch

Nice pen tester for checking nutrient levels a must have for a hydro grower The customer service is almost instant and these guys really care to make sure your happy,My first pen the display lock feature did not work, not the end of the world the unit still worked just did not lock,They over nighted me a new pen and I am very pleased

I know for a fact my pool salt level is 3000-3100 ppm ( to different test methods). However this device constantly measures TDS levels of 2200-2400 ppm for total dissolved solids. That can’t be possible. Salt is only one source of TDS components in the pool. Something is off with this device

We are experimenting with a small hydroponics kit and needed to be able to measure the quantity of nutrients in the water. This meter works well and gives a quick readout of the electrical conductivity (EC) of the water. The display is quite small so you might need a magnifying glass to see some of the details on the LCD display, but I don't consider that to be a problem (will depend on your age and eyesight!). I don't know how long the battery will last, but for my use probably a long time since measurement takes only a few seconds and is done infrequently. Note that if your use case requires that you measure a total dissolved solids (TDS) value, you just need to multiply EC by 500 (easy to do "in your head" if you multiply by 1000 and then divide by 2).

How do I like it?!?!? Well I ordered the first one from you’ll and after calibrate it I went to using it on my 1st medical grow it read 6.5 ph so I feed nutes and watered the plant and the next morning BAM!!!! LOCK OUT!!! So I ordered another 1 from you’ll and calibrated both of them and the previous PH tester was way off!!! I took extra care in handling and putting it up after I used it. The old one and the new still don’t read the same .1 off. If I get a lock out on my next medical grow I’m done with City Farmer!! I will never order from you’ll again!! I’ve sent them a email asking if they had calibration solution I could order and never got a answer back!! And yes I calibrate to the direction both time!!

Great meter. It’s super easy to use and has a cool case cover to keep it protected. Fast delivery, just all around a great purchase. I'm glad when searching I ordered this one. Don't be fooled by the price! Its better than more expensive ones.